{"id":131070,"date":"2018-02-14T00:25:54","date_gmt":"2018-02-14T00:25:54","guid":{"rendered":"https:\/\/\/controleur-dalimentation-de-sauvegarde-35v-a-enfichage-a-chaud\/"},"modified":"2018-02-14T00:25:54","modified_gmt":"2018-02-14T00:25:54","slug":"controleur-dalimentation-de-sauvegarde-35v-a-enfichage-a-chaud","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/controleur-dalimentation-de-sauvegarde-35v-a-enfichage-a-chaud\/","title":{"rendered":"Contr\u00f4leur d\u2019alimentation de sauvegarde 35V \u00e0 enfichage \u00e0 chaud"},"content":{"rendered":"<p>Le contr\u00f4leur&nbsp;\u00e0 enfichage \u00e0 chaud et le circuit bloqueur int\u00e9gr\u00e9s du LTC3351 utilisent des MOSFET canal N pour permettre un passage \u00e0 faibles pertes de l\u2019entr\u00e9e vers la sortie, ainsi qu\u2019une limitation en courant par repliement de caract\u00e9ristique pour r\u00e9duire les courants d\u2019appel. Le composant permet une alimentation ininterrompue, fiable \u00e0 court terme, en cas de d\u00e9faillance de l\u2019alimentation principale, dans les applications comme les sauvegardes de donn\u00e9es pour les disques \u00e0 m\u00e9moire flash (SSD) et les modules combinant m\u00e9moires volatiles et non volatiles (NVDIMM&nbsp;: Non-Volatile Dual In-Line Memory Modules), les alarmes de d\u00e9faillance de l\u2019alimentation dans les applications m\u00e9dicales et industrielles et les signaux indicateurs de d\u00e9faillance de l\u2019alimentation. Le LTC3351 offre un contr\u00f4le PowerPath<sup>TM<\/sup>, un chargeur et un \u00e9quilibrage de la batterie de condensateurs, la gestion du \u00ab&nbsp;bon \u00e9tat&nbsp;\u00bb&nbsp;et la protection des condensateurs. Les autres applications comprennent les alimentations de secours 12V, de forte intensit\u00e9, et celles devant rester toujours en fonctionnement (UPS) pour les serveurs, le stockage de masse et les syst\u00e8mes de grande disponibilit\u00e9.&nbsp;<\/p>\n<p>Le LTC3351 pr\u00e9sente une plage de la tension d\u2019entr\u00e9e, de 4,5V \u00e0 35V, et la possibilit\u00e9 d\u2019un courant de charge \/ sauvegarde de plus de 10A. Le composant procure aussi un \u00e9quilibrage et une protection contre les surtensions pour une batterie de un \u00e0 quatre supercondensateurs en s\u00e9rie. Le contr\u00f4leur abaisseur synchrone du LTC3351 permet une charge \u00e0 courant constant&nbsp; \/ tension constante de la batterie de condensateurs, jusqu\u2019\u00e0 5V par \u00e9l\u00e9ment. En mode sauvegarde, le contr\u00f4leur abaisseur fonctionne,&nbsp;\u00e0 l\u2019inverse, en mode contr\u00f4leur DC\/DC, \u00e9l\u00e9vateur, synchrone, pour fournir de l\u2019\u00e9nergie \u00e0 partir de la batterie de supercondensateurs \u00e0 l\u2019alimentation du syst\u00e8me \u00e0 sauvegarder. Le contr\u00f4leur&nbsp;\u00e0 enfichage \u00e0 chaud procure des seuils programmables de sous-tension\/ surtension (UV\/OV), une dur\u00e9e de d\u00e9marrage compatible PCIe et un seuil pr\u00e9cis \/ une entr\u00e9e RETRY.<\/p>\n<p>Le LTC3351 comprend un convertisseur analogique-num\u00e9rique (CAN) pr\u00e9cis de 16 bits, qui g\u00e8re de fa\u00e7on continue les tensions et intensit\u00e9s d\u2019entr\u00e9e et de sortie. De plus, le syst\u00e8me de mesure interne g\u00e8re les param\u00e8tres associ\u00e9s aux condensateurs de sauvegarde, incluant la tension de la batterie de condensateurs, le condensateur et la r\u00e9sistance ESR (r\u00e9sistance \u00e9quivalente s\u00e9rie) de la batterie pour garantir un stockage d\u2019\u00e9nergie ad\u00e9quat et la production d\u2019\u00e9nergie pendant la sauvegarde. En g\u00e9rant la capacit\u00e9 effective des supercondensateurs de sauvegarde, le LTC3351 prolonge la vie d\u2019un condensateur en permettant au syst\u00e8me de fixer sa tension \u00e0 une valeur minimum tout en garantissant le maintien de l\u2019\u00e9nergie de sauvegarde requise. Tous les param\u00e8tres du syst\u00e8me et les \u00e9tats de dysfonctionnement peuvent \u00eatre g\u00e9r\u00e9s via une interface deux fils I<sup>2<\/sup>C, et les niveaux d\u2019alerte peuvent \u00eatre r\u00e9gl\u00e9s pour alerter le syst\u00e8me en cas de variation soudaine de n\u2019importe quel de ces param\u00e8tres mesur\u00e9s.<\/p>\n<p><a href=\"http:\/\/www.linear.com\/product\/LTC3351\">www.linear.com\/product\/LTC3351<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p> Analog Devices annonce le Power by Linear LTC3351, un circuit int\u00e9gr\u00e9 contr\u00f4leur d\u2019alimentation de sauvegarde et chargeur de supercondensateurs qui poss\u00e8de une protection d\u2019enfichage \u00e0 chaud (hot swap) en entr\u00e9e et toutes les caract\u00e9ristiques n\u00e9cessaires \u00e0 la r\u00e9alisation d\u2019une alimentation de sauvegarde compl\u00e8te, autonome \u00e0 base de condensateurs.<\/p>\n","protected":false},"author":9,"featured_media":131071,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[],"domains":[47],"ppma_author":[1141],"class_list":["post-131070","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Contr\u00f4leur d\u2019alimentation de sauvegarde 35V \u00e0 enfichage \u00e0 ...<\/title>\n<meta name=\"description\" content=\"Analog Devices annonce le Power by Linear LTC3351, un circuit int\u00e9gr\u00e9 contr\u00f4leur d\u2019alimentation de sauvegarde et chargeur de supercondensateurs qui...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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